JP6656320B2 - Machine tool control device - Google Patents

Description

  The present application relates to a control device for a machine tool.

  2. Description of the Related Art Conventionally, various configurations for backing up data used in machine tools have been known (for example, see Patent Document 1). Patent Literature 1 discloses a machine tool control device capable of backing up data to a portable storage medium such as a memory card. In this control device, when the operator mounts the storage medium on the storage medium drive, the checker checks whether the specific file exists on the storage medium. In this control device, the existence of the specific file on the storage medium is a backup start condition. If the specific file exists on the storage medium, a backup operation is started. Such a configuration prevents a backup operation from starting when a storage medium that does not include a specific file is mounted.

JP 2006-260128 A

  In the control device disclosed in Patent Literature 1, data is backed up when an operator mounts a storage medium on the storage medium drive. Therefore, for example, if the operator forgets to perform the backup operation, the data is not backed up.

  The present invention provides a machine tool control device that can automatically back up data in a control device with high security and can restore data with high security when restoring data, while solving the problems described above. The purpose is to do.

  One aspect of the present disclosure is a control device for a machine tool, which controls an operation of a machine tool by an NC program, reads the NC program, and servo-controls a feed device of the machine tool, including an NC device, a display unit, and an operation unit. An operation panel having an operation panel configured to receive a command for operating the machine tool and transmit an operation signal based on the command, according to an NC program or an operation signal from the operation panel. A machine control device that executes sequence control of a machine tool, data of an NC program and NC parameters input to the NC device, and data of a sequence control program and machine parameter data used by the machine control device. Connected to the machine control device via a switch that can connect and disconnect the communication between the storage device and the machine control device An external storage device, the machine control device connects a switch at a preset timing, backs up data in the data storage device to the external storage device, and disconnects the switch after the backup, and a backup processing unit. And a restore processing unit for connecting a switch when data restoration is instructed from the operation panel, restoring data from the external storage device to the data storage device, and disconnecting the switch after the restoration. Control device.

  A control device for a machine tool according to an aspect of the present disclosure includes an external storage device in addition to a data storage device, and the external storage device is connected to the machine control device via a switch. The switch is connected at a preset timing, and once the data is backed up in the external storage device, the switch is disconnected. According to such a configuration, data is automatically backed up at a preset timing, and the switch is disconnected except at the time of backup. Therefore, data in the control device can be automatically backed up with high security. Similarly, in the above control device, the switch is connected when data restoration is instructed, and the switch is disconnected once data is restored from the external storage device. According to such a configuration, the switch is disconnected except at the time of restoration. Therefore, when restoring data, the data can be restored with high security.

  The restore processing unit may restore predetermined data according to the authority of the person who issued the restore command from the operation panel. For example, if the person who issued the restoration is a machine tool operator, some information may not be necessary. When such unnecessary information is displayed on the display unit, the operator may be confused. According to the above configuration, since predetermined data is restored according to the authority of the person who instructed the restoration, only appropriate data can be restored.

  The preset timing may include at least one of a designated time, when the power of the machine tool is turned on, and when the power of the machine tool is turned off. By performing backup at one or more of these timings, the backup data can be kept new.

  According to an embodiment of the present disclosure, it is possible to provide a machine tool control device that can automatically back up data in the control device with high security and can restore data with high security when restoring data.

FIG. 1 is a schematic block diagram illustrating a system including a machine tool control device according to an embodiment. It is an example of the image displayed on an operation panel. It is an example of the image regarding the backup setting displayed on the operation panel. It is an example of the image regarding the selection of the authority displayed on the operation panel. It is an example of the image regarding the restore setting displayed on the operation panel. 6 is a flowchart illustrating a backup operation of the control device. 9 is a flowchart illustrating a restore operation of the control device.

  Hereinafter, a control device for a machine tool according to an embodiment will be described with reference to the accompanying drawings. Similar or corresponding elements are denoted by the same reference numerals, and redundant description will be omitted. The figures may be scaled differently for ease of understanding.

  FIG. 1 is a schematic block diagram illustrating a system including a machine tool control device according to the embodiment. The system 100 includes a machine tool 1 and a control device 2. The machine tool 1 can be various types of NC machine tools (for example, a machining center, an electric discharge machine or a laser machine), and the operation thereof is controlled based on the NC program.

  The control device 2 controls the operation of the machine tool 1 based on various types of data including the NC program. The control device 2 may be attached to any component (for example, a cover or a bed) of the machine tool 1, or may be arranged around the component. The control device 2 includes an NC device 3, an operation panel 4, a machine control device 5, a data storage device 6, and an external storage device 7, and these components are connected by, for example, a bus or the like. ing. The machine control device 5 and the external storage device 7 are connected via a security switch 8.

  The NC device 3 reads an NC program input from outside or from the machine control device 5 and servo-controls the feed device of the machine tool 1. The NC program 3 receives an NC program and NC parameters used in the NC program. The NC device 3 can include components such as a processor such as a CPU (Central Processing Unit), a ROM (read only memory), and a RAM (random access memory).

  The operation panel 4 can include a display unit 41 configured to show information to a user, and an operation unit 42 configured to receive a command from the user. The operation panel 4 can include, for example, a touch panel. The operation panel 4 may include a display device such as a liquid crystal display and an input device such as a keyboard, a mouse, and / or buttons. The operation panel 4 may include various buttons such as a button for turning on and off the power of the machine tool 1 and a button for starting a cycle operation of the machine tool 1. The user can input various commands related to the operation of the machine tool 1 and the operation of the control device 2 to the control device 2 through the operation unit 42. The operation panel 4 transmits an operation signal of the machine tool 1 and an operation signal of the control device 2 to the machine control device 5 based on the input command.

  The machine control device 5 executes processing including sequence control of the machine tool 1. The machine control device 5 can include, for example, components such as a processor such as a CPU and ROM and RAM. The machine control device 5 includes a general-purpose processing unit 51, a PLC (Programmable Logic Control) processing unit 52, a backup processing unit 53, and a restore processing unit 54. These processing units include, for example, data This can be realized by executing a program stored in the storage device 6 by a processor.

  The general-purpose processing unit 51 executes, for example, control on data input and output, control on an image shown on the display unit 41, and control on writing and reading of data to and from the data storage device 6. The general-purpose processing unit 51 may execute other control.

  The PLC processing unit 52 executes sequence control of the machine tool 1 according to an NC program or an operation signal from the operation panel 4. Such sequence control includes, for example, control related to the operation of the automatic tool changer and / or control related to the operation of the automatic pallet changer. The PLC processing unit 52 may execute other control. A sequence control program (also referred to as a PLC ladder in the present disclosure) used by the PLC processing unit 52 can be stored in the data storage device 6.

  The backup processing unit 53 connects the security switch 8 at a preset timing, backs up the data in the data storage device 6 to the external storage device 7, and disconnects the security switch 8 after the backup (the backup processing unit 53). Detailed operation will be described later). The “preset timing” may include at least one of a designated time, a power-on of a machine tool, and a power-off of a machine tool, and may be set by a user through the operation panel 4. Yes (more on that later).

  The restore processing unit 54 connects the security switch 8 when the restoration of data is instructed from the operation panel 4, restores the data from the external storage device 7 to the data storage device 6, and switches the security switch 8 after the restoration. Disconnect (detailed operation of the restore processing unit 54 will be described later).

  A data storage device (also referred to as a “first storage device”) 6 in the present disclosure stores various types of data relating to the machine tool 1 and the control device 2. The data storage device 6 can include, for example, an auxiliary storage device such as one or more hard disks. The data storage device 6 includes, for example, an NC program and NC parameters input to the NC device 3, a sequence control program and machine parameters used by the machine control device 5, a program for realizing a processing unit of the machine control device 5, A program (for example, a whitelist or blacklist program) for protecting the NC device 3 and the machine control device 5 from virus infection, and other data related to the machine tool 1 and the control device 2 can be stored. it can.

  The external storage device 7 backs up data stored in the data storage device 6. The data backed up in the external storage device 7 can be restored to the data storage device 6 when necessary (for example, when data in the data storage device 6 is lost). The external storage device 7 can include, for example, a hard disk drive and an auxiliary storage device such as a USB flash memory and a CF card.

  The security switch 8 is configured to connect and disconnect communication between the machine control device 5 and the external storage device 7. The security switch 8 can be always disconnected until a connection signal is received from the machine control device 5, for example. The security switch 8 is configured, for example, so that the machine control device 5 can recognize the external storage device 7 when connected, and even when the external storage device 7 is physically connected to the machine control device 5 when disconnected. It can be a program-based software-based switch configured such that the machine control device 5 cannot recognize the external storage device 7. Alternatively, the security switch 8 may be any switch as an electronic component provided in a circuit between the machine control device 5 and the external storage device 7, and is connected according to a signal from the machine control device 5. And disconnection can be switched. Alternatively, the security switch 8 physically disconnects the external storage device 7 from the hardware interface until the connection signal is received from the machine control device 5 and receives the connection signal from the machine control device 5. Alternatively, the external storage device 7 may be a mechanical linear motion mechanism including a cylinder or the like inserted into a hardware interface.

  In the system 100 according to the present embodiment, the machine control device 5 is connected to the user LAN server 101, the cloud server 102, and the server 103 of the machine tool maintenance company via networks N1, N2, and N3, respectively. The user LAN server 101 can be, for example, a server of a company that uses the machine tool 1, and the network N1 can be an in-house network. The networks N2 and N3 can be, for example, the Internet. The user LAN server 101, the cloud server 102, and the server 103 of the machine tool maintenance company are connected to the machine control device 5 via the security switch 8, and the machine control device 5 includes these in addition to the external storage device 7. The server can back up data stored in the data storage device 6. In the present disclosure, any one or any combination of the external storage device 7, the user LAN server 101, the cloud server 102, and the server 103 of the machine tool maintenance company may be referred to as a “second storage device”.

  The machine control device 5 as described above can prohibit the connection of the security switch 8 when the NC device 3 or the machine control device 5 is infected with a virus. For example, when the control device 2 has a program for protecting from virus infection, the control device 2 can determine whether the NC device 3 or the machine control device 5 has been infected with a virus. Also, for example, a virus infection may be found when an operator notices an abnormality. If a virus infection is found, the machine control device 5 can prohibit the connection signal from being transmitted to the security switch 8 by turning on a connection prohibition command flag, for example. With this configuration, when the NC device 3 or the machine control device 5 is infected with a virus, the connection of the security switch 8 is prohibited, and the safety of the external storage device 7 (or the second storage device) is maintained. In this case, the data storage device 6 is initialized, all data in the data storage device 6 is erased, and the OS (Operating System) is reinstalled. Then, the backup data stored in the external storage device 7 is restored to the data storage device 6, and the NC device 3 and the machine control device 5 can be used again. With the above configuration, the security switch 8 can reduce the risk of virus infection of the external storage device 7 (or the second storage device).

  Next, an example of a screen displayed on the display unit 41 of the operation panel 4 will be described.

  FIG. 2 is an example of an image displayed on the operation panel, and can be an initial screen when backup / restore is selected. The image includes a left area DL and a right area DR. The left area DL includes various buttons. For example, when a “setting” button at the top of the left area DL is pressed, various buttons related to settings including “backup / restore” are displayed in the left area DL. When the "Backup / Restore" button is pressed, a "Backup" button and a "Restore" button are displayed in the right area DR, and the user can press either the "Backup" button or the "Restore" button.

  Next, an image related to backup setting will be described. FIG. 3 is an example of an image related to backup settings displayed on the operation panel. When the “backup” button in the right area DR in FIG. 2 is pressed, the image shown in FIG. 3 is displayed.

  In the left area DL, a folder in which data that has already been backed up in the external storage device 7 (or the second storage device) is displayed. As will be described later, the folder name may be the date and time when the backup is executed. In the example of FIG. 3, as shown in the left area DL, the folder name is from July 2 to 6, 2018. The data is backed up at 12:00 on each day (5 times in total).

  The backup at each timing may be a differential backup or a full backup. When the differential backup is performed, for example, in the example of FIG. 3, the first folder on July 2, 2018 may include all data of all data items selected at the time of the backup. The second July 3, 2018 folder may contain only additions, updates, and changes to the first data. Similarly, the third, fourth, and fifth folders on July 4, 5, and 6, 2018 may include only additions, updates, and changes to the second, third, and fourth data, respectively.

  A box B1 for setting a backup execution timing in advance is displayed above the right area DR. By using the box B1, the user can select at least one of “designated time”, “when the machine tool is turned on”, and “when the machine tool is turned off”. When “specified time” is selected, the user can specify, for example, a fixed time every day, a fixed time on a fixed day of every week, and the like.

  Below the box B1 in the right area DR, a box B2 for designating the name of the data to be backed up (for example, the name of the folder in which the data to be backed up is stored) is displayed. For example, when nothing is specified in the box B2, the date and time when the backup is executed may be specified in the folder name. Further, for example, a folder name already existing in the external storage device 7 (or the second storage device) may be designated in the box B2.

  Below the box B2 in the area DR on the right side, a box B3 for designating a path of data to be backed up is displayed. By using the box B3, the user can specify the storage location of the data to be backed up in the external storage device 7 (or the second storage device).

  Below the box B3 in the right area DR, a plurality of buttons BD of backup items are listed. For example, the user can select an item to be backed up by pressing a button BD of each item. Further, for example, the user may select all the items by pressing the all selection button BT1. Alternatively, when the image of FIG. 3 is displayed, all the items may be selected in advance. In this case, the user can deselect items not to be backed up by pressing the button of each item, and can deselect all items by pressing the select all button BT1.

  As shown in FIG. 3, the backup items include, for example, NC programs, machining condition groups, work offsets, macro variables, macro programs, machine parameters, NC parameters, PLC ladders, function operations, custom views, and external processing calls. Etc. can be included. The data to be backed up may include other items.

  The machining condition group is a value related to the machining condition. For example, when the machine tool 1 is an electric discharge machine, the machining condition group can include current, voltage, on time, off time, and the like. In the case of a laser processing machine, the processing condition group can include a laser output value, a pulse frequency, and the like. If the machine tool 1 is a machine processing machine such as a machining center, an NC milling machine, an NC lathe, and an NC grinding machine, the processing is performed. The condition group can include a type of the tool, an offset amount, and the like. The work offset is a coordinate system unique to the work to be processed, and can be set by, for example, CAD (Computer Aided Designing) or CAM (Computer Aided Manufacturing). The machine parameter is a fixed parameter unique to the machine, and can include, for example, a soft limit or the like in the machine tool 1. The NC parameter is a parameter used in the NC program. The PLC ladder is a program used to execute sequence control. The function operation can include a program necessary for using the function operation buttons displayed on the display unit 41. The custom view can include a program for monitoring in the machine tool 1. The external processing call can include a program necessary for communicating with the external device. It should be noted that these data items, including those not described above, are well known to those skilled in the art.

  A start button BT2 for starting backup in accordance with the above setting is displayed below the button BD in the right area DR. When the start button BT2 is pressed, the backup is started at the timing set in the box B1.

  Next, an image related to restore settings will be described. FIG. 4 is an example of an image related to selection of authority displayed on the operation panel, and FIG. 5 is an example of an image related to restore settings displayed on the operation panel. For example, when the “Restore” button in the right area DR in FIG. 2 is pressed, the screen shown in FIG. 4 is displayed.

  The user presses one of the buttons BT3, BT4, BT5 according to the authority of the user. The button BT3 indicates the authority with which the data items that can be restored are most restricted, and can be pressed, for example, by the operator of the machine tool 1. The button BT4 indicates the authority for restricting how many of the data items that can be restored, and can be pressed, for example, by a maintainer of the machine tool 1 (for example, a maintainer from a machine tool maintenance company). The button BT5 indicates the authority to restore all data, and can be pressed, for example, by an administrator of the machine tool 1 (for example, a person responsible for managing the machine tool 1 of a company that uses the machine tool 1).

  When any one of the buttons BT3, BT4, and BT5 is pressed, the machine control device 5 can display a screen (not shown) for inputting a password on the display unit 41 (see FIG. 1) of the operation panel 4. . A password corresponding to each authority can be stored in the data storage device 6, for example. When the password input by the user through the operation unit 42 corresponds to the stored password, the machine control device 5 can display the image shown in FIG.

  In the left area DL, a folder in which data that has already been backed up in the external storage device 7 (or the second storage device) is displayed. By checking the check box, the user can select a folder storing data that the user wants to restore from the displayed folders.

  A box B4 for designating a backup data name (or a folder name in which the backup data is stored) in the external storage device 7 (or the second storage device) that the user wants to restore is provided above the right region DR. Is displayed. The user may specify the folder name by checking the check box of the folder displayed in the left area DL as described above, or may input the folder name directly into the box B4. Is also good.

  Below the box B4 in the right area DR, a plurality of buttons RD for restore items are listed. The button RD is displayed according to the authority corresponding to the password input through the operation unit 42. For example, the example in FIG. 5 shows an image when the button BT4 (button for maintenance person) (see FIG. 4) is pressed and the corresponding password is input. Comparing the restore item button RD in FIG. 5 with the backup item button BD in FIG. 3, “macro variable” is not displayed in FIG. "Macro variables" are excluded from data items that can be restored by the maintainer because they may be necessary for the administrator but not required for the maintainer.

For example, by pressing the button RD of each item, the user can select an item to be restored from the displayed data items. Further, for example, the user may select all items by pressing the all select button BT6. Alternatively, when the image of FIG. 5 is displayed, all the items may be selected in advance. In this case, the user can deselect items not to be restored by pressing the button of each item, and can deselect all items by pressing the select all button BT6.

  A start button BT7 for starting restoration according to the above settings is displayed below the right area DR. When the start button BT7 is pressed, the restoration is started.

  The restoration uses the backup data at the time of the first backup and the differential data at the time of the second and subsequent backups, thereby restoring the data stored in the data storage device 6 at the time of the backup with the specified backup data name. can do.

  Next, the operation of the control device 2 will be described. First, the backup operation will be described. FIG. 6 is a flowchart illustrating the backup operation of the control device.

  When the backup start button BT2 (see FIG. 3) is pressed, the backup processing unit 53 reads the backup execution timing as shown in FIG. 6 (step S100). Subsequently, the backup processing unit 53 determines whether the current time has reached the backup start time (Step S102). If it is determined in step S102 that the current time is not the backup start time, the backup processing unit 53 executes step S102 again after a predetermined time, for example.

  If it is determined in step S102 that the current time has reached the backup start time, the backup processing unit 53 determines whether a connection prohibition command for the security switch 8 has been issued (step S104). If it is determined in step S104 that the connection prohibition command for the security switch 8 has been issued, the backup processing unit 53 terminates a series of operations without executing backup.

  When it is determined in step S104 that the connection prohibition command for the security switch 8 has not been issued, the backup processing unit 53 connects the security switch 8 (step S106). Next, the backup processing unit 53 determines whether or not this time is the first backup (Step S108). If it is determined in step S108 that this time is the first backup, the backup processing unit 53 executes a full backup (step S110). Subsequently, the backup processing unit 53 disconnects the security switch 8 (Step S112), and ends a series of operations.

  If it is determined in step S108 that this time is not the first backup, the backup processing unit 53 executes a differential backup (step S114). Subsequently, the backup processing unit 53 disconnects the security switch 8 (Step S112), and ends a series of operations.

  Next, the restore operation will be described. FIG. 7 is a flowchart illustrating a restore operation of the control device.

  When any of the buttons BT3, BT4, and BT5 (see FIG. 4) is pressed, the restore processing unit 54 reads the authority of the restore as shown in FIG. 7 (step S200). Next, the restore processing unit 54 determines whether the password input through the operation unit 42 is correct (Step S202). If it is determined in step S202 that the password is incorrect, the restore processing unit 54 executes steps S200 to S202 again.

  When it is determined in step S202 that the password is correct, the restore processing unit 54 displays a restore item according to the authority (step S204). Next, the restore processing unit 54 recognizes the designated restore item and the file name of the backup data (Step S206). Subsequently, the restore processing unit 54 determines whether a connection prohibition command for the security switch 8 has been issued (step S208). When it is determined in step S208 that the connection prohibition command for the security switch 8 has been issued, the restore processing unit 54 ends the series of operations without executing the restore.

  When it is determined in step S208 that the connection prohibition command for the security switch 8 has not been issued, the restore processing unit 54 connects the security switch 8 (step S210). Subsequently, the restore processing unit 54 restores the backup data in the external storage device 7 to the data storage device 6 (Step S212). Subsequently, the restore processing unit 54 disconnects the security switch 8 (Step S214), and ends a series of operations.

  The control device 2 of the machine tool 1 according to the present embodiment as described above includes an external storage device 7 in addition to the data storage device 6, and the external storage device 7 controls the machine via a security switch 8. It is connected to the device 5. Then, the security switch 8 is connected at a preset timing, and once the data is backed up to the external storage device 7, the security switch 8 is disconnected. According to such a configuration, data is automatically backed up at a preset timing, and the security switch 8 is disconnected except at the time of backup. Therefore, data in the data storage device 6 can be automatically backed up with high security. Similarly, in the control device 2, the security switch 8 is connected when data restoration is instructed, and once the data is restored from the external storage device 7, the security switch 8 is disconnected. According to such a configuration, the security switch 8 is disconnected except during restoration. Therefore, when restoring data, the data can be restored with high security.

  In the control device 2 according to the present embodiment, the restore processing unit 54 restores predetermined data in accordance with the authority of the person who issued the restore command from the operation panel 4. For example, when the person who instructed the restoration is the operator of the machine tool 1, some information may not be necessary. When such unnecessary information is displayed on the display unit 41, the operator may be confused. According to the configuration of the present embodiment, since predetermined data is restored according to the authority of the person who instructed restoration, only appropriate data can be restored.

  In the control device 2 according to the present embodiment, the preset timing includes at least one of a designated time, a time when the power of the machine tool is turned on, and a time when the power of the machine tool is turned off. By performing backup at one or more of these timings, the backup data can be kept new.

  Further, the system 100 according to the present embodiment is a machine tool 1 and a control device 2, which includes an NC device 3, an operation panel 4, a machine control device 5, and a first storage device 6. The system 100 includes at least an external storage device 7 in the control device 2 and an external server (user LAN server 101, cloud server 102, machine tool maintenance company server 103) outside the control device 2. Further comprising a second storage device, including one, wherein the machine control device 5 is connected to the second storage device via a connectable and disconnectable security switch 8; The security switch 8 is connected at a preset timing, the data in the first storage device 6 is backed up to the second storage device, and the security switch 8 is turned on after the backup. The backup processing unit 53 and the security switch 8 are connected when data restoration is instructed from the operation panel 4, and the data is restored from the second storage device to the first storage device 6 and restored. And a restore processing unit 54 that disconnects the security switch 8 later. In the system 100, the data in the data storage device 6 can be automatically backed up to at least one of the external storage device 7 in the control device 2 and the external server outside the control device 2 with high security, and the data is high when data is restored. Data can be restored with security.

  At the factory site where the machine tool 1 is installed, the data is automatically and reliably backed up at a predetermined timing without the intervention of an operator, and it is possible to prepare for an emergency such as a malfunction or failure of the machine. . For example, a defect or failure occurs somewhere in the control device 2 or a peripheral device, and after performing a device replacement, a restore operation is performed. You can return to the state.

  When the NC program and the processing conditions of the processing performed in the past do not exist in the data storage device 6, the restore operation is performed according to the instruction of the display unit 41 of the operation panel 4, thereby obtaining the same shape and accuracy as the processing performed in the past. Can be easily reproduced.

  With the production management system of the factory where the machine tool 1 is installed via the user LAN server 101, it is possible to manage the backup and restoration of the data of each machine tool 1. In addition, data can be backed up to an external storage device outside the company via the cloud server 102, and data resistant to disasters such as fire can be protected. Further, by backing up and restoring machine tool data by remote control via the server 103 of the machine tool maintenance company, it becomes possible for an expert to restore the machine with the shortest and minimum man-hours.

  Although the embodiment of the control device of the machine tool has been described, the present invention is not limited to the above embodiment. One skilled in the art will appreciate that various modifications of the above-described embodiments are possible. In addition, those skilled in the art should be able to incorporate features included in one embodiment into another embodiment or replace features included in another embodiment, as long as no inconsistency arises. Will understand.

REFERENCE SIGNS LIST 1 machine tool 2 control device 3 NC device 4 operation panel 5 machine control device 6 data storage device 7 external storage device 8 security switch 41 display unit 42 operation unit 53 backup processing unit 54 restore processing unit

Claims (3)

In a machine tool control device that controls the operation of a machine tool by an NC program,
An NC device that reads the NC program and servo-controls a feed device of the machine tool;
An operation panel having a display unit and an operation unit, configured to receive a command for operating the machine tool and to transmit an operation signal based on the command,
A machine control device that executes sequence control of the machine tool according to the NC program or the operation signal from the operation panel;
A data storage device that stores the NC program and NC parameter data input to the NC device, and a sequence control program and machine parameter data used by the machine control device;
Via a switch capable of connecting and disconnecting communication with the machine control device, connected to the machine control device, an external storage device,
With
The operation panel includes a plurality of backup item buttons for selecting an arbitrary backup item in advance, a box for setting backup timing in advance, and a start button for starting backup at the timing set in the box. And is configured to display
The machine control device includes:
The switch is connected at a preset timing in the box of the operation panel, and a backup item selected in advance in the backup item button of the operation panel is backed up from the data of the data storage device to the external storage device. And a backup processing unit that disconnects the switch after the backup,
A restore processing unit that connects the switch when data restoration is instructed from the operation panel, restores data from the external storage device to the data storage device, and disconnects the switch after the restoration,
A control device for a machine tool, comprising:   The control device for a machine tool according to claim 1, wherein the restore processing unit restores predetermined data according to the authority of a person who instructed the restore from the operation panel.   The control device for a machine tool according to claim 1, wherein the preset timing includes at least one of a designated time, a time when a machine tool is turned on, and a time when a machine tool is turned off.

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